* {
  margin: 0;
  padding: 0;
  font-family: "Poppins";
}
section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  box-sizing: border-box;
  background: #151515;
}
section div {
  position: relative;
}
section div #rangeValue {
  position: relative;
  box-sizing: border-box;
  text-align: center;
  display: block;
  font-size: 10em;
  color: #a6a6a6;
  font-weight: 800;
  z-index: 1;
}
section div #rangeValue::after {
  content: '%';
}
section div .range {
  position: relative;
  width: 500px;
  height: 30px;
  appearance: none;
  background: rgba(0, 0, 0, 0.8);
  outline: none;
  border-radius: 30px;
  border: 2px solid #000;
  box-shadow: 0 0 0 2px #151515, inset 0 0 5px #000;
  z-index: 1;
  overflow: hidden;
}
section div .range::-webkit-slider-thumb {
  appearance: none;
  width: 30px;
  height: 30px;
  background: #a6a6a6;
  cursor: pointer;
  border: 10px solid #363636;
  border-radius: 50%;
  box-shadow: -415px 0 0 400px #a6a6a6;
  background: skyblue;
}
section div #fillRangeTopLeft {
  position: fixed;
  top: 0;
  left: 0;
  height: 50%;
  z-index: 2;
  pointer-events: none;
  box-sizing: border-box;
  background-image: url(塞西莉亚.jpg);
  background-position: -7px 0px;
  background-repeat: no-repeat;
}
section div #fillRangeTopRight {
  position: fixed;
  top: 0;
  right: 0;
  width: 50%;
  z-index: 2;
  pointer-events: none;
  box-sizing: border-box;
  background-image: url(塞西莉亚.jpg);
  background-position: -775px 0px;
  background-repeat: no-repeat;
}
section div #fillRangeBottomLeft {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 50%;
  z-index: 2;
  pointer-events: none;
  box-sizing: border-box;
  background-position: -7px -360px;
  background-image: url(塞西莉亚.jpg);
  background-repeat: no-repeat;
}
section div #fillRangeBottomRight {
  position: fixed;
  bottom: 0;
  right: 0;
  height: 50%;
  z-index: 2;
  pointer-events: none;
  box-sizing: border-box;
  background-position: -775px -360px;
  background-image: url(塞西莉亚.jpg);
  background-repeat: no-repeat;
}
